Oils Aint Oils <Merged Thread>

[krt10]

anyone had any experience with ULX110 brand oil in these motors? 

 

I use it in my escort track car and stock SR20DET with no complaints.

 

Just purchased a ba XR6 Turbo and wondering if anyone has used and has feedback on it.

 

cheers

[purxr6t]

Anyone using Penrite 10 Tenths 20W-60 ?

 

Just want to know what people think of it and 

If they noticed higher oil pressure at idle after giving it a hard time.

 

Anyone know the HTHS number?

 

We will be giving this oil a try as do not like having oil pressure go under 20psi at idle.

And many have said that lower viscosity oils have dropped oil pressure significantly to 5 psi or so,

At idle after driving the vehicle hard at various events,

For a while.

 

That does not sound good.

 

We are thinking of chucking an engine oil cooler on there too,

To keep the temps and pressures even more under control at such events.

 

Cheers.

[Tom Tucker]

I've got the Castrol Edge 20w60 in mine at the moment. It boosted my idle oil pressure on idle to high 20s. 

The Penrite stuff is probably good to go. 

[purxr6t]

Engine is happy with the Penrite 10 tenths 20W-60 Oil.

Hot oil pressure is much higher as in over 10 psi higher (now around 35psi @ hot idle),

Over the 10W-40 which was dropping to around 20psi or a bit less after being given a hard time.

It gets driven hard sometimes but also does long drives in traffic jams many arvo's too.

 

Much happier with the higher hot idle idle pressures,

Seems safer for making the 700rwkw engine last !!!!

 

Oil cooler seems like the next thing to do.

 

Anyone monitor their oil temps?

And know where the temps normally sit after some hard driving or long time in traffic, etc.?

 

Anyone done a comparison before and after an oil cooler installation,

On temps and pressure?

 

Cheers.

[Tom Tucker]

Good outcome mate. Exact experience I had going from 10W40 to 20W60. I even found the 15W50 Penrite 10 tenths not quite enough.

 

Do you roll around on the road at 1000hp all the time?

[purxr6t]

The car has 12 tunes with a haltech plug in ECU,

Usually it's cruising around on over 825hp @ wheels on E85.

 

But really for driving in traffic there's not really anywhere to spool it up,

So it isn't getting taken to those revs.

 

Every now and then when there's a chance it gets to spool up,

But obviously can't really floor it for long while staying within the speed limit....

 

Probably would use a bit less fuel on 98,

which we haven't used since getting the car. 

 

It is flex fuel but only the first few tunes suit 98 as well. 

 

Interestingly when I rang Penrite the rep seemed to have no idea what they were talking about,

And didn't have a clue about the HTHS number,

The number they eluded to was so clearly wrong it was not funny.

They also reckoned that the 20W-60 would be too thick for a Barra.

 

Obviously that is not correct as many have used it and many have said that anything thinner,

Gives too low pressure at idle after a hard time at events etc. 

 

It was a bit annoying that Penrite could not give an accurate HTHS number though.

Pretty sure the 10 tenths 15W-50 is HTHS 5.28

So the 20W-50 should be even higher.

 

The numbers the Penrite rep stated,

were so far out it is not funny....

[Tom Tucker]

20W60 is too thick for a stock engine, but when clearances are opened up a bit it works well

[El Andrew]

I might be wrong, but I'm sure I read once that the oil pressure is caused by resistance of the engine against the oil. But pressure is really just a proxy for oil flow, which is what you really want.

Decent oil pressure means your pump is working, which indicates oil is flowing sufficiently to reach everywhere in your engine. If the oil thins after heaps of heat the pressure might drop at idle, but this is just because the viscosity of the oil has reduced, not that the pump is not working or the oil isn't flowing sufficiently around the engine.

So thicker oil will bump the gauge up due to more resistance, making you feel better, but may have a negative impact on flow due to increased viscosity and possibly cause issues with a stock engine with tight clearances and narrow oil galleries feeding precision top end parts.

I'm no expert obviously. But I'd be reluctant to start a cold stock engine with something starting with a 20 inside it.

[purxr6t]

Plenty of people have been running 20W-50 or whatever they want in 6cyl falcons for many decades,

They are not an F1 engine or anything.

 

As for the pressure flow thing you mentioned,

On 4 stroke dirt bikes,

Due to them being ball bearings flow can be more important than pressure.

 

However on a Car engine with the bearings just being shells,

And the oil the only thing "cushioning" the bearings and the crank etc.

Stopping the two from making contact,

I would say pressure is very much important.

 

People were dropping down to 5psi at hot idle on track days with thinner oils,

Nearly all who have done some track days have gone to a heavier oil.

 

I was also interested in the HTHS number,

Where the higher number the better. 

 

The HTHS number generally increases with viscosity.

 

I honestly think many oils are getting too thin when hot,

Saw some oil tests back in the day where viscosity of some oils,

reduced very quickly after only a short time of use.

 

I think the thicker oil is good insurance against those things,

And it is also on E85 so their is likely some dilution....

Edited 19/03/24 10:38 AM by purxr6t